/// <reference types="react" />
import { PureComponent } from 'react';
import { Position } from './utils';
export interface Props {
    alignX?: 'left' | 'right';
    alignY?: 'top' | 'bottom';
    target?: HTMLElement;
    fitHeight?: number;
    fitWidth?: number;
    boundariesElement?: HTMLElement;
    mountTo?: HTMLElement;
    offset?: number[];
    onPositionCalculated?: (position: Position) => Position;
    onPlacementChanged?: (placement: [string, string]) => void;
}
export interface State {
    popup?: HTMLElement;
    position?: Position;
    overflowScrollParent: HTMLElement | false;
}
export default class Popup extends PureComponent<Props, State> {
    static defaultProps: {
        offset: number[];
        boundariesElement: HTMLElement;
    };
    state: State;
    private debounced;
    private placement;
    /**
     * Calculates new popup position
     */
    private updatePosition(props, popup?);
    /**
     * Popup initialization.
     * Checks whether it's possible to position popup along given target, and if it's not throws an error.
     */
    private initPopup(popup);
    private handleRef;
    private handleResize;
    componentWillReceiveProps(newProps: Props): void;
    componentDidMount(): void;
    componentWillUnmount(): void;
    private renderPopup();
    render(): JSX.Element | null;
}